Utility knife



FIG. 1 is a left side perspective view of a utility knife showing my newdesign;

FIG. 2 is a right side perspective view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front, elevational view thereof; and

FIG. 8 is a rear, elevational view thereof.

The ornamental design for a utility knife, as shown and described.